Internal tank equipment
Maintenance of nuclear power plants (NSSS components)

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Internal tank equipment
Maintenance of nuclear power plants (NSSS components)

Author : Jean-Pierre HUTIN

Review date: April 26, 2021 | Lire en français

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3. Internal tank equipment

3.1 Design and manufacturing

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3.1.1 General provisions and functions

The vessel's internal equipment comprises two sub-assemblies: lower internal equipment (LIE), which supports the fuel assemblies (the core), and upper internal equipment (UIE), which holds the assemblies at their upper end and guides the control rods. They are made up of a large number of components assembled by welding or screwing, with exceptional dimensional accuracy. Most are made of austenitic type 304L steel in a hyper-hardened condition; others...

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